Sole pattern



sepfn 4, 1928. 1,682,880

R. G. ANDERSON ET AL SOLE PATTERN Filed July' 3, 18.88Z

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SOLE PATTERN.

Application filed July 3,

Ilhis invention relates to sole patterns and more particularly topatterns for cutting soles of rubber or other similar sheet materials.Such patterns are used in connection u vwith sole cutting machines andare detachably mountable therein to serve as forms about which a cuttingknife travels.

l-lleret-ofore blank patterns haye been formed of two or more piecescomprising the u pattern and the holding means for securing it to thecutting machine. The pattern was provided with a relatively narrowcrimped knife-guiding edge and this edge was then iiled to bring thecontour of the pattern to i the size desired. Not only was this processof forming the pattern slow and expensive, but when cutting an underbevelled sole 'the vknife as it rose at the completion of a cuttingoperation would cut through the bevelled P edge of the sole unless somemeans was p rovided for retracting the knife prior to its rise.

An object of this invention is to provide a pattern which can be usedwithout any separate device for retracting the knife. Another i objectis to simplify the method of making patterns by providing a patternhavin a rolled edge. Another object is to provi e a pattern forundercutt-ing formed in such a way as to eliminate the necessity ofgrinding the edges to obtain the desired size. btill another object isto provide a pattern having a one-piece construction. Still a furtherobject is to provide a pattern for undercutting which will beself-stripping.

A feature of the invention is the rolled or pressed edge whereby thedesiredangle for cutting with an underbevel is obtained withoutgrinding. Another feature is the bead located on the under side inspaced relation to the edge of the pattern. Another -feature is the widebearing edge by which a portion of the pattern can be adjustedvertically relative to the knife as the machine head and cuttinginstruments are raised,` while at the saine time allowing for retainingthe knife in position against the pattern for a repeating operation.Still another feature is the uniform height of the patterns whichrenders tliem readily interchangeable without readjustment of themachine. i

Briefly the invention consists in forming a one piece pattern bypressing the same from a sheet of metal, the pattern having holding lugspierced 'and formed from the pattern it- 1928. Serial No. 120,315.

self.. The invention consists also in forming a knife guiding surface byrolling or pressing the edge of the pattern to the angle desired forcutting. The underbevelled patterns are provided with a stock holdingmeans consisting of a bead extending around each pattern adjacent to theknife guiding edge and spaced therefrom a distance greater than theamount which the knife projects under the pattern. Placing the beadadjacent rather than on the edge, as has been formerly done, renders thepattern also a stripping means for the cut blank for as the bead pressesagainst the surface of the stock, it causes the cut edge to be raisedand separate from the stock.

l The invention will best be understood if the following description isread in connection with the accompanying drawings in which:

Figure 1 is a plan view of the pattern. Figure 2 is a sectional view onthe line 2-2 of Fig. 1.

Figure 3 is a detail sectional View on the line 3-3 of Fig. 1.

Figures. is a plan View showing a modified construction.

Figure 5 is a section on the line 5*-5 of Fig. 4.

Figure 6 is a section on the line 6--6 of Fig. 4, and

Figure 7 is a detail sectional view illustrating the self-strippingmeans. i

The sole pattern 1 having the bead 2 eX- tending around the patternadjacent its edge, is provided with a wide knife bearing edge 3 whichacts as a guide surface for the knife 4. This wide bearing edge of thepattern is formed by rolling the edge to the angle desired for cutting.The Wide bearing edge 3 provides a bearing surface against which thethick portion of the knife blade can contact when the knife is elevatedto its extreme position relative to the pattern and makes it possible toretain the knife in position for a repetition of the cutting operation.The knife blade is tapered to a thin edge and it is desirable that thestrain from the friction exerted between the blade and the pattern beborne by the thick portion of the blade to eliminate danger of breakingthe blade. For this purpose the iiange 3 is made suiiiciently higharound those portions of the pattern where the knife enters and leavesthe sheet material to insure that the thickened portion of the bladewill bear against the flange even when slight-ly, the upper edge havinga pronounced curve or roll. By this provision sharp edges are eliminatedwhich might cut or score the knife blade as it is raised or loweredrelative to the pattern.

lVhen the pattern is in operable position, it presses down on the solestock 5 with considerable Weight and the bead sinks into the sheetmaterial momentarily.

The pattern is provided with the holding lugs 6 and 6 by which it can besecured to a sole cutting machine. The pattern is, however, a one piececonstruction, the holding lugs being formed by piercing the blank andbending thel material inwardly. The bushing 7 and the rivets 8 carriedby t-he lugs serve as means by which the pattern can be attached to asupport. This is a distinct improvement over the former art since iteliminates the attached holding devices or so-called ribs and quesformerly used which at times became .loose and permitted the pattern toshift i use. The pattern is adapted to be supported by the rear holdingbushing 7 allowing the toe end to drop under gravity and is held byexternally applied spring pressure, as described in my copendingapplication Serial No. 159,577 filed January 7, 1927. The heel portionof the pattern is permanently maintained in relatively constant positionvertically with respect to the knife and consequently itis ordinarilynot necessary to provide the edge of the heel with a flange. The factthat the heel is not flanged does not prevent the knife from beingretained in location for a repeating operation when the machine head islifted since in operation the knife enters the sole stock on one side ofrolled toe end of the pattern and leaves it on the other side of the toeend after about one and one-third revolutions.

The bead 2 serves because of the small surface in contact with the stockto prevent the stock from adhering to the bottom of the pattern. Thebead is disposed laterally of the guiding edge of the pattern a distancesuch that the pressure exerted by the same against the sheet material isdisposed laterally of the knife blade, and consequently affords noresistance to the passage of the knife and exerts no pressure upon thesevered edges. This distance can be varied depending upon the thicknessof the sheet material to be cut and the distance which the knife isprojected under the pattern. As the bead presses down on the surface ofthe blank, it tends to dent in the surface of the stock directly beneathit causing the edge of the cut blank to curl up slightly away from thestock. It is particularly contemplated to cause the bead to firmly pressagainst the sheet material at the toe and heel portions since it is atthese rtions that the sheet material is subjecte to the greatest strainfrom the knife which might serve to pull the material out of position.

The pattern may be, if desired, and in the case of the under cut patternpreferably is, reinforced on its upper surface by the parallel beads 9running length wise of the pattern.

A modification of the pattern described above is used for over-bevelcutting (Figs. 4 and 5). In this case the holding lugs are pierced fromthe pattern and formed as before but on the opposite side of thepattern. The edge is rolled as before, but forms both the knife guidingsurface and the bearing surface. In this embodiment of the invention theedge of the pattern may be filed to fit the contour of the sole.

Herctofore patterns have been non-uniform in height due to the manner inwhich they have been manufactured b crimping and filing the edges. Agreat a vantage of the atterns formed in the manner disclosed herein isthat due to the rolled edge construetion and the elimination of theseparately at tached holding devices, theyare uniform in height and aretherefore especially adapted for use in automatic machinery. Theonepiece rolled edge construction of these patterns also greatly reducesthe time and expense heretofore required for their manufacture by themethods formerly in use.

The invention is of advantage in cutting under-bevelled blanks of auniform outside size in which the angle of the bevel may be varied. Inusing the cut blank, it is applied to a shoe with the upper surface asviewed in Fig. 2 functioning as the outside or bottom of the sole. Thethinned portion of the ed e of the sole is then folded up over theoutside of the shoe upper and forms an even edge of uniform heightregardless of the angle of the bevel. In cutting the blank the spaceleft between the body portion of the pattern and the sheet material asthe bead presses into the latter, -is very slight and the angle at whichthe knife cuts, can be varied considerably without changing the outsidesize of the sole.

Having thus described my invention, what I claim and desire to protectby Letters Patent is:

1. A sole pattern, the knife guiding edge of which is under-bevelled tothe desired angle for cutting.

2. A so e pattern having a bevelled knife guiding edge and a bead uponits under surface projecting from the pattern adjacent to the edge butslightly removed therefrom.

3. A sole pattern having a flan ed knife. guidinI edge extendinglaterally t erefrom partially around said pattern and a bead located inspaced relation to the edge of the pattern.

4. A one-piece sole pattern having integral lugs for connection to asole cutting machine, said lugs comprising parallel ears bent up fromthe body of the pattern and a rigid connection between the ears adjacenttheir tops.

5. A sole pattern forvunder-bevel cutting having an underbevelledknife-guiding edge and a bearing surface consisting of a bead extendingpartially at least around the pattern adjacent the edge in spacedrelation thereto.

6. A sole pattern comprising a body portion having an angularly directedperipheral flange, the free edge of the flange being convexly curved.

7. A sole pattern having holding lugs formed integrally therewith, aflanged edge slightly curved at its extremity, and a bead extendingaround the pattern and somewhat removed from the edge.

Signed at New Haven, county of New Haven, and State of Connecticut, this20th day of May, 1926.

ROLAND G. ANDERSON.

Signed at Woonsocket, county of Provi dence,v and State of RhodeIsland,' this 24 day of' May, 1926.

JOHN GAINES.

